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Engineering Worksheet: Mechanical Advantage and Work

Engineering lesson 15: Mechanical advantage and work · Set 479 · 40 questions
TalentJR

Engineer's tip (Less force, more distance): MA = load ÷ effort. Work (J) = force (N) × distance (m); force = work ÷ distance; distance = work ÷ force. Ideal ramp: MA = length ÷ height, effort = load ÷ MA.

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  1. 1.🏋️ A machine lifts a load of 600 N when you push with 150 N. What is its mechanical advantage (MA)?
  2. 2.🏋️ A 6 kg box is lifted straight up by 2 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  3. 3.🏋️ Pushing a crate 8 m took 480 J of work. What force was used, in newtons?
  4. 4.🏋️ A machine lifts a load of 60 N when you push with 30 N. What is its mechanical advantage (MA)?
  5. 5.🏋️ Can a simple machine reduce the work done? (a) yes, always (b) yes, by half (c) no, work stays the same (d) only on Mondays
  6. 6.🏋️ A force of 130 N pushes a cart 2 m along the floor. How much work is done, in joules?
  7. 7.🏋️ A machine lifts a load of 1200 N when you push with 200 N. What is its mechanical advantage (MA)?
  8. 8.🏋️ A force of 450 N did 1800 J of work. How many metres did the object move?
  9. 9.🏋️ Mechanical advantage (MA) = … (a) load ÷ effort (b) load × effort (c) effort ÷ load (d) load + effort
  10. 10.🏋️ A force of 70 N did 700 J of work. How many metres did the object move?
  11. 11.🏋️ A machine lifts a load of 680 N when you push with 170 N. What is its mechanical advantage (MA)?
  12. 12.🏋️ Pushing a crate 9 m took 720 J of work. What force was used, in newtons?
  13. 13.🏋️ Work is done when a force moves something … (a) without moving it (b) very slowly (c) only upwards (d) through a distance
  14. 14.🏋️ A force of 180 N pushes a cart 3 m along the floor. How much work is done, in joules?
  15. 15.🏋️ A machine lifts a load of 300 N when you push with 60 N. What is its mechanical advantage (MA)?
  16. 16.🏋️ Pushing a crate 6 m took 2580 J of work. What force was used, in newtons?
  17. 17.🏋️ A 1 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  18. 18.🏋️ An 18 kg box is lifted straight up by 4 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  19. 19.🏋️ A 3 kg box is lifted straight up by 5 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  20. 20.🏋️ A machine lifts a load of 360 N when you push with 60 N. What is its mechanical advantage (MA)?
  21. 21.🏋️ A machine lifts a load of 60 N when you push with 20 N. What is its mechanical advantage (MA)?
  22. 22.🏋️ A 15 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  23. 23.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 2600 N box up it, in newtons? (ideal ramp, no friction)
  24. 24.🏋️ Pushing a crate 3 m took 180 J of work. What force was used, in newtons?
  25. 25.🏋️ A smooth ramp is 4 m long and rises 1 m. What effort pushes a 1600 N box up it, in newtons? (ideal ramp, no friction)
  26. 26.🏋️ A force of 340 N pushes a cart 3 m along the floor. How much work is done, in joules?
  27. 27.🏋️ A force of 260 N pushes a cart 4 m along the floor. How much work is done, in joules?
  28. 28.🏋️ A force of 90 N pushes a cart 1 m along the floor. How much work is done, in joules?
  29. 29.🏋️ A force of 370 N did 1480 J of work. How many metres did the object move?
  30. 30.🏋️ Pushing a crate 7 m took 840 J of work. What force was used, in newtons?
  31. 31.🏋️ A force of 340 N did 1020 J of work. How many metres did the object move?
  32. 32.🏋️ A 19 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  33. 33.🏋️ A force of 250 N did 2250 J of work. How many metres did the object move?
  34. 34.🏋️ A longer ramp to the same height needs … (a) no effort (b) more effort (c) the same effort (d) less effort
  35. 35.🏋️ A smooth ramp is 6 m long and rises 2 m. What effort pushes a 2100 N box up it, in newtons? (ideal ramp, no friction)
  36. 36.🏋️ In which unit is work measured? (a) joule (J) (b) watt hour (c) newton (N) (d) metre (m)
  37. 37.🏋️ A force of 200 N pushes a cart 6 m along the floor. How much work is done, in joules?
  38. 38.🏋️ A force of 80 N pushes a cart 8 m along the floor. How much work is done, in joules?
  39. 39.🏋️ A 3 kg box is lifted straight up by 3 m. Taking 1 kg to weigh about 10 N, how much work is done, in joules?
  40. 40.🏋️ Pushing a crate 3 m took 1500 J of work. What force was used, in newtons?

Answer key

  1. 4
  2. 120
  3. 60
  4. 2
  5. no, work stays the same
  6. 260
  7. 6
  8. 4
  9. load ÷ effort
  10. 10
  11. 4
  12. 80
  13. through a distance
  14. 540
  15. 5
  16. 430
  17. 40
  18. 720
  19. 150
  20. 6
  21. 3
  22. 450
  23. 650
  24. 60
  25. 400
  26. 1020
  27. 1040
  28. 90
  29. 4
  30. 120
  31. 3
  32. 570
  33. 9
  34. less effort
  35. 700
  36. joule (J)
  37. 1200
  38. 640
  39. 90
  40. 500

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